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Extremely High Tunability of Low Dielectric Constant 1‐3 Type ( Ba , Sr ) TiO 3 /Resin Epoxy
Author(s) -
Liang Ruihong,
Liao Wanfang,
Wu Junwei,
Cao Fei,
Dong Xianlin
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05264.x
Subject(s) - epoxy , materials science , dielectric , composite material , permittivity , composite number , microstructure , relative permittivity , optoelectronics
A 1‐3 type ( Ba , Sr ) TiO 3 ( BST )/resin epoxy composites were prepared by dice and fill technique. The microstructure, dielectric, and tunable properties of columnar composites were investigated. An important feature of 1‐3 type composites is that the dc field is efficiently applied to the high‐permittivity ferroelectric phase. With the increase of resin epoxy content, the tunability of the composite remains nearly unchanged while the permittivity decreases much. The coefficient of dielectric nonlinearity β increases sharply with the increase of resin epoxy volume and β increases up to 2.8 × 10 12 when the resin epoxy volume is 90%. These properties make 1‐3 type composites very promising for potential tunable device applications.